نتایج جستجو برای: unimorph piezoelectric vibrator

تعداد نتایج: 14547  

Journal: :British medical journal 1976
J S Haft H B Benjamin M Wagner

Journal: :East European journal of physics 2022

The problem of electromagnetic wave pressure on a thin conductive vibrator located in rectangular waveguide is solved. Wave H10 falls the vibrator. perpendicular to wide wall waveguide. current arising under action electric field calculated. distribution along almost uniform. microwave range depends little conductivity. Two components magnetic - longitudinal and transverse exist wave. When thes...

2012
Mohit Jain Ajeet Pal Singh Soshant Bali Sanjit Kaul

There is evidence to support the claim that speedbreakers can cause accidents and injury. When a vehicle approaches a speed-breaker at a speed greater than some threshold velocity, the risk of accident or injury is substantial. Speed-breakers are inconspicuous in low visibility conditions, like at night, or when there is fog, rain or snow. This problem is particularly acute in developing countr...

Journal: :Pediatrics 2000
V Huhtala L Lehtonen R Heinonen H Korvenranta

OBJECTIVE To evaluate the effectiveness of infant massage compared with that of a crib vibrator in the treatment of infantile colic. METHODS Infants <7 weeks of age and perceived as colicky by their parents were randomly assigned to an infant massage group (n = 28) or a crib vibrator group (n = 30). Three daily intervention periods were recommended in both groups. Parents recorded infant cryi...

Journal: :Advanced intelligent systems 2023

Existing miniature underwater robots, which use electromagnetic actuators or soft actuators, function in shallow waters. However, the deep sea, robots face challenges, such as miniaturization of pressure protection unit and driving method for rapid agile motions. Herein, a jet-driven high-pressure environment is proposed by utilizing high-frequency vibration piezoelectric vibrator. Thereafter, ...

Journal: :Review of Scientific Instruments 2023

A resonant inertial impact rotary piezoelectric motor based on a self-clamping structure is designed, assembled, and tested. The designed mainly includes rotor (two vibrators, preload mechanism, intermediate connection mechanism), clamping another auxiliary mechanism. ceramic sheet the drives vibrator to swing under excitation of single harmonic wave. Because there mechanism formed by combinati...

2001
V. Werner

The concept of critical points in nuclear phase transitional regions is discussed from the standpoints of Q-invariants and wave function entropy. It is shown that these critical points very closely coincide with the turning points of the entropy and Q-invariants, establishing the singular character of these points in nuclear phase transition regions. Such critical points provide two well define...

2016
Meng Gao Lihong Li Wenbo Li Haihua Zhou Yanlin Song

A high-performance flexible piezoelectric nanogenerator (PNG) is fabricated by a direct writing method, which acquires both patterned piezoelectric structure and aligned piezoelectric nanowires simultaneously. The voltage output of the as-prepared PNG is nearly 400% compared with that of the traditional spin-coated device due to the effective utilization of stress. This facile printing approach...

2016
Debby Herbenick

I'm not an inexperienced girl at masturbation. I've been doing it for a very long time, but actually only ever discovered what an orgasm was when I was 18 and got my first vibrator. This never bothered me because I wasn't sexually active then, but now it does. I realized I have NEVER been able to orgasm from physical touching or from just using fingers. I've always needed a vibrator of sorts an...

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